react-native-billing

Supports one-time purchases, subscriptions, consumables, and detailed transaction handling, including updateSubscription for upgrades and downgrades, as outlined in the extensive Javascript API.

Wraps complex native Android In-App Billing APIs into straightforward JavaScript promises, making monetization accessible without deep Android expertise, as demonstrated in the code examples.

Includes Google's static response product IDs for simplified testing during development, allowing developers to simulate purchases without real transactions.

Provides specific methods like isSubscribed and loadOwnedPurchasesFromGoogle to handle subscription status, cancellations, and cache updates, essential for recurring revenue models.